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20 lines
705 B
Python
20 lines
705 B
Python
import sqlite3
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con = sqlite3.connect(":memory:")
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con.execute("create table lang (id integer primary key, name varchar unique)")
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# Successful, con.commit() is called automatically afterwards
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with con:
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con.execute("insert into lang(name) values (?)", ("Python",))
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# con.rollback() is called after the with block finishes with an exception, the
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# exception is still raised and must be caught
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try:
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with con:
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con.execute("insert into lang(name) values (?)", ("Python",))
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except sqlite3.IntegrityError:
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print("couldn't add Python twice")
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# Connection object used as context manager only commits or rollbacks transactions,
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# so the connection object should be closed manually
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con.close()
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